1 Introduction

In this report, some summaries of Referral to Treatment Time (RTT) are presented. The summaries are based on the Referral to Treatment Time Index (RTTI).

Please, refer to the documentation of RTTI for definitions, examples and other details.

This report is based on RTT data from the NHS website, which includes data up to March, 2025.


2 Fixed time summaries

This section presents summaries of waiting times on March, 2025.

2.1 The distribution of RTTI on March, 2025.

The boxplot below shows the boxplots of RTTI for all medical specialties (or treatment functions) in March, 2025.



Providers with RTTI larger than \(Q_3 + 1.5 IR\), where \(Q_3\) is the 3rd quartile and \(IR\) is the interquartile range of RTTI, are considered as “outliers”, i.e. they are providers with a very large RTTI, compared to the RTTI of the other providers, within the treatment function.

In the following table, the “outlying” providers are identified using the rule above. The table can be filtered by Region, Provider and Treatment Function.


As expected, we get a different distribution of RTTI, by medical specialty, for IH providers. See the boxplot below. The vertical axis has the same maximum value, for the sake of comparison between NHS and IH providers.

Note that the distribution for General Internal Medicine is rather distorted by the boxplot because there are only 2 providers: one with low RTTI, the other one with high RTTI.

Considering Gynaecology, RTTI for some IH providers is higher than all of the RTTI for NHS providers.




2.2 Ranking of medical specialties by RTTI

The following table contains medical specialties ranked by the national level RTTI on March, 2025. This is for NHS providers. The higher the rank the higher the RTTI. The number in brackets is the RTTI.

As can be seen RTTI where there is a DTA is higher. Also, Elderly Medicine, Rheumatology and Mental Health have the lowest waiting times (RTTI <1), at least in March, 2025.

On the other hand, Gynaecology, Trauma & Orthopaedics, Oral Surgery and Ear Nose and Throat are among the medical specialties where waiting times are the longest.


Alternatively, the information in the table can be displayed as follows


And for comparison with IH


2.3 RTTI by provider and medical specialty

Click on the white filter boxes, below the column names, to choose a region, provider or medical specialty.

Empty cells represent a missing value (no information about the provider for the medical specialty).



2.4 Ranked RTTI of medical specialties by provider

Low rank corresponds to low RTTI.

The table can be filtered. Click on the white boxes below the column names.